Parker Compounds

Question

Answer

Parker Compounds

Do Parker O-rings contain asbestos?

No.

Do Parker O-rings contain latex rubber?

The term “latex rubber” is commonly used (incorrectly) to refer specifically to natural rubber latex. Parker O-Rings do not contain any natural rubber latex, which is suspected of causing allergic reactions in some people.

Do Parker O-rings contain mercury or are they made with mercury-containing equipment?

No.

How does an internal lubri- cant work?

Internal lubricants are typically oils or waxes that are mixed into the raw material prior to molding. In appli- cation, this oil or wax migrates to the surface of the O-ring to provide lubrication and extend seal life. Internal lubricants can be extracted by exposure to hot oils or high heat. Internally lubricated compounds seldom if ever “run out” of internal lubricant solely through use.

Is N70 a Parker compound number?

N70 is not a Parker compound number. This is probably a reference to generic 70 durometer nitrile rubber. We recommend Parker compound N0674-70 as a replacement / improvement.

What is the replacement compound for an obsolete seal material?

Contact Parker O-Ring Division for the recommend replacement for any obsolete seal material at 859-335- 5101

What O-ring compounds are internally lubricated?

Parker offers a number of internally lubricated compounds.

What’s the difference between N674, N674-7, N674- 70, N0674, and N0674-70?

Nothing.  Parker O-Ring Division has adapted its compound numbering system over the years, and all of these names refer to the same O-ring compound. We have written a letter explaining our compound number ing system in more detail.

Where can I find information on a specific Parker compound?

ORD 5712 or interactive on website

Where can I get a mate- rial test report for a Parker O-ring?

Material Test Reports for Parker compounds can be viewed online or on Parker’s inPHorm seal design software package.

Why can’t I find this com- pound in the Parker catalog?

Because Parker is constantly developing new materials, only the standard compounds are shown in the Park- er O-ring Handbook and O-ring Reference Guide. For an updated compound offering list, refer to Parker’s ORD 5712.

Why does this O-ring have a dull gray or white powder on the surface?

Some seal materials exhibit a dusty gray or white coating on the outside surface of the seal material called bloom. Bloom is primarily composed of non-reacting catalysts used to speed the curing process. The presence of bloom seldom if ever affects seal performance in application.